Question

At constant volume and temperature conditions, the rate of diffusion $\rho _ { B }$ are related by the expression.

• A. $D _ { A } = \left[ D _ { B } \cdot \frac { \rho _ { A } } { \rho _ { B } } \right] ^ { 1 / 2 }$
• B. $D _ { A } = \left[ D _ { B } \cdot \frac { \rho _ { B } } { \rho _ { A } } \right] ^ { 1 / 2 }$
• C. $D _ { A } = D _ { B } \left( \frac { \rho _ { A } } { \rho _ { B } } \right) ^ { 1 / 2 }$
• D. $D _ { A } = D _ { B } \left( \frac { \rho _ { B } } { \rho _ { A } } \right) ^ { 1 / 2 }$

Answer 1

Answer: (D)

$D _ { A } = D _ { B } \left( \frac { \rho _ { B } } { \rho _ { A } } \right) ^ { 1 / 2 }$

Answer 2

$\frac { D _ { A } } { D _ { B } } = \sqrt { \frac { \rho _ { B } } { \rho _ { A } } } = \left[ \frac { \rho _ { B } } { \rho _ { A } } \right] ^ { \frac { 1 } { 2 } }$ ; $\therefore D _ { A } = D _ { B } \left( \frac { \rho _ { B } } { \rho _ { A } } \right) ^ { \frac { 1 } { 2 } }$